Share your experience!
I updated the OREO update this morning.
So far my phone crashes when I leave it for 5 mins. It then switches off and takes many presses of the on button.
When it comes back on, it displays 'SYSTEM UI has stopped'. I can do nothing with it.
I restart it. It takes a long time.
It comes back on fairly normally....then repeats the cycle.
What has happened with this update??
Sounds like a software fault. Try using the Sony software to do a repair. Be warned it can take a while!